drm/amd/display: make optc32_phantom_crtc_post_enable,...

drm/amd/display: make optc32_phantom_crtc_post_enable, optc32_setup_manual_trigger and optc32_set_drr static

These three functions are not used outside the function
dcn32_optc.c, so the modification is defined as static.

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn32/dcn32_optc.c:159:6: warning: no previous prototype for function 'optc32_phantom_crtc_post_enable'.
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn32/dcn32_optc.c:218:6: warning: no previous prototype for ‘optc32_set_drr’.
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn32/dcn32_optc.c:193:6: warning: no previous prototype for ‘optc32_setup_manual_trigger’.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2140Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_optc.c

@@ -156,7 +156,7 @@ static bool optc32_disable_crtc(struct timing_generator *optc)
 	return true;
 }
 
-void optc32_phantom_crtc_post_enable(struct timing_generator *optc)
+static void optc32_phantom_crtc_post_enable(struct timing_generator *optc)
 {
 	struct optc *optc1 = DCN10TG_FROM_TG(optc);
 
@@ -190,7 +190,7 @@ static void optc32_set_odm_bypass(struct timing_generator *optc,
 	optc1->opp_count = 1;
 }
 
-void optc32_setup_manual_trigger(struct timing_generator *optc)
+static void optc32_setup_manual_trigger(struct timing_generator *optc)
 {
 	struct optc *optc1 = DCN10TG_FROM_TG(optc);
 	struct dc *dc = optc->ctx->dc;
@@ -215,7 +215,7 @@ void optc32_setup_manual_trigger(struct timing_generator *optc)
 	}
 }
 
-void optc32_set_drr(
+static void optc32_set_drr(
 	struct timing_generator *optc,
 	const struct drr_params *params)
 {